643061156316 has 96 divisors (see below), whose sum is σ = 1545188671488. Its totient is φ = 208034205120.

The previous prime is 643061156293. The next prime is 643061156371. The reversal of 643061156316 is 613651160346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53551185 + ... + 53563191.

It is an arithmetic number, because the mean of its divisors is an integer number (16095715328).

Almost surely, 2^643061156316 is an apocalyptic number.

It is an amenable number.

643061156316 is an abundant number, since it is smaller than the sum of its proper divisors (902127515172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643061156316 is a wasteful number, since it uses less digits than its factorization.

643061156316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12711 (or 12709 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 643061156316 in words is "six hundred forty-three billion, sixty-one million, one hundred fifty-six thousand, three hundred sixteen".